A couple of weeks ago, when it was really hot, I spent a couple of sweaty hours pulling wiring conduit through the right wing. I remember drops of sweat falling off my face and arms as I did it. It eventually got smeared all over the bottom wing skin as I worked. Today, when I walked in the hangar after a week away, I noticed about ten patches of white surface corrosion on the skins, totalling about 1 foot x 2 feet. I was too busy to take photos of it, but I got to work on it right away.
I carefully masked and sanded the affected area of the skins, cleaned them up with acetone, then primed the affected areas with self-etching primer. I hope this takes care of it. I would have thought the Alclad would have protected the skins better. Perhaps I need to check my personal pH level...
This irregular-shaped area had about 10 small patches of white corrosion in it.
